Spud-actuating device for dredging-machines



(No Model.)

w. s. (JARKIN. SPUDAGTUATING DEVICE FOR DREDGING MACHINES. No. 428,163Patented May 20, 1890.

IN VEN TOR MZ/a fitter-nay.

UNITED STATES PATENT OFFICE.

'WILLARD S. CARKIN, OF EAST SAGINAl V, MICHIGAN.

SPUD-ACTUATING DEVICE FOR DREDGING-MACHINES.

P TION forming part of Letters Patent No. 428,163, dated May 20, 1890.

Application filed February 10, 1890- Serial 110.339,!)19. (No model.)

To all whom it may concern.-

Be it known that I, WVILLARD S. OARKIN, a citizen of the United States,residing at East Saginaw, in the county of Saginaw and State ofMichigan, have invented certain new and useful Improvements inSpud-Actuating Devices for Dredging-Machines; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form a part ofthis specification.

This invention relates to a certain arrangement of mechanism foractuating and fixing the anchoring-spud of a dredging-machine, in whichsaid spud travels between vertical guides secured to the hull of thedredginglnachine and is actuated by chains secured to cross-heads boltedto the vertical guides, said chains passing over sheaves in each end ofthe spud and around a revolvingdrum, whereby said spud is adapted to bemoved up or down, and a grip or key is employed to lock said chain topermanently fix the spud when set, the object being to provide simpleand effective means forsetting and locking the spud of a floatingdredge, so as to securely anchor said dredge when in operation. This object is attained by themechanism illustrated in the accompanyingdrawings, in which- Figure 1 is a front elevation of a portion of afloating hull and the spud confined between the vertical guides securedthereto, the side of said hull being broken away, showing the chainspassing around the revolving drum, by means of which the spud isactuated. Fig. 2 is a side elevation of Fig. 1, taken at right anglesthereto. Fig. 3 is an isometricalview of the key for locking the chainand fixing the spud. Fig. 4 is a central vertical section through across-head through which the spudchain passes, showing the port thereinthat receives the key for locking said chain. Fig. 5 is a view of Fig.4, showing the spud-chain passing through the cross-head and the keyengaging the chain to lock the anchoring spud.

Referring to the letters of reference, A indicates the spud; B B, theguideways between which the spud slides up and. down in its operation; OC, the eross-heads bolted to the guideways l3, and which confine thespud between said guides; D and D, the chains by which the spud isactuated; E, a floating hull carrying the dredging-niachine, and towhich the guideways B are secured, and G the key adapted to lock thespud-chains.

The floating hull E, on which is located the dredging-machine andoperating engine, is not shown in full, as such construction is so wellunderstood it is thought to be unnecessary to illustrate it. Thevertical guides B B, which are composed of heavy timbers, are bolted tothe side of the hull E, and at such distance apart as to freely receivethe spud A between their adjacent faces. The cross-heads C C are boltedto the outer face of the guides B near their ends and confine the spud Abetween said guides. (See Fig. 1.) The chain D is attached to the uppercross-head C and passes over the sheave I in the upper end of the spudand over the sheave I, (shown by dotted lines,) whereby said chain isguided onto the upper face of the drum H, around which it is wound. Thechain D is attached to thelower cross-head C and passes over the sheaveF in the lower end of the spud A and over the sheave F (shown by dottedlines) to the under face of the drum h, and is wound thereon, as clearlyshown in Fig. 1. The drum H is mounted 011 the shaft t, and is adaptedto be revolved in either direction by the operatingen gine of thedredging-machine. (Not shown.)

To the back'face of the guideways B is secured the cross-head G, asshown in Fig. 2, said cross-head having the vertical hole J, throughwhich the chain D passes, and having also the port K, opening throughthe side of the cross-head and at right angles to the hole J andcommunicating therewith, as clearly shown in Fig. 4.

The key G is provided with the slot f, opening from the end thereof, theedges of said key forming the slot being beveled from the faces of thekey, as shown at a in Fig. 3. Said key is adapted to enter the port Kand receive one link of the chain edgewise in the slot f, theadjacentends of the other links fitting into the beveled edges a of saidkey, thus securely locking said chain from being moved up or down, asclearly shownin Fig. 5.

It will now be apparent thatby the arrangement of parts described andshown in Fig. 1 a revolution of the drum II in either direction one ofthe spud-chains will wind onto the drum as the other unwinds therefrom,thus enabling the spud to be raised or lowered, as desired, by revolvingsaid drum.

To set the spud for the purposes of anchoring the dredging-machine, thedrum II is revolved, so as to wind the chain D thereon, which chain,passing over the sheaves I and I, carries the spud A downward, the chainD running off of the drum as the spud descends, whereby the point A ofthe spud is forced into the earth sufficiently to securely anchor thedredge in the desired position. To fix or lock the spud after being set,the key G is inserted in the port K of the cross-head 0, through whichthe chain D passes. Said key engages the links of the chain D, as beforedescribed, and shown in Fig. 5, whereby said chain is locked and thespud securely fixed in place. To raise the spud, the key G is withdrawnfrom the port K, releasing the chain D, when the drum is revolved, so asto unwind the chain D and to wind the chain D thereon, whereby the spudis raised, as will be readily understood. Then by placing the key hackinto .the port K, astride the chain-link, the spud A will be locked inits elevated position.

Having thus fully set forth the nature of my invention, what I claimis- 1. In combination with the hull of adredging-machiue, ananehoringspud slidiugly attached to a supporting-frame thereon, chainsto raise and lower said spud, one of the chains passing through a portin the spud-supportin g frame, the port K, and forked key adapted to beinserted therein and to engage with a link of the chain, substantiallyin the man ner and for the purposes specified.

2. In a dredging-inachine, the combination of theYertically-reeiprocating spud, the guideways and cross-heads supportingthe spud, the drum, the chains leading therefrom to and over the endportions of the spud, being attached to the cross-heads C, thecross-head 0, having the ports .I K therein, the chain passing throughthe former port, and the forked key adapted. to be inserted. into thelatter port, and for the purposes specified.

3. In combination with the hull of a dredging-maehine, the guideways,the cross-heads mounted thereon, the spud carrying asheare near each endthereof, the drum, the chains leading therefrom over the sheaves of thespud. and over the intermediate sheaves, their ends being secured to thecross-heads C, the cr0ss-head 0, having the port K, and the forked gripadapted to be inserted into said port and to embrace the chain, for thepurposes specified.

In testimony whereof I aliix my signature in presence of two witnesses.

- IVILLARD S. CARKIN.

Witnesses:

D. I). JonNsoN, JULIAN S. IIANAFORD.

